Muhammad Ali was an American professional boxer and activist. Nicknamed "the Greatest", he is regarded as one of the most significant sports figures of the 20th century and is often regarded as the greatest heavyweight boxer of all time. He held the Ring magazine heavyweight title from 1964 to 1970. He was the undisputed champion from 1974 to 1978 and the WBA and Ring heavyweight champion from 1978 to 1979. In 1999, he was named Sportsman of the Century by Sports Illustrated and the Sports Personality of the Century by the BBC.
Ali in 1967
Cassius Clay and his trainer Joe E. Martin, January 1960
Clay defeated veteran Pole Zbigniew Pietrzykowski to win gold in the 1960 Summer Olympics.
On-site poster for Cassius Clay's fifth professional bout
Heavyweight is a weight class in combat sports and professional wrestling.
Heavyweight boxers Andrew Golota (on the left) vs. Kevin McBride at the Madison Square Garden